diff --git a/test/test_utils.py b/test/test_utils.py
index 0e25de6b7..b7ef51f8d 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -640,6 +640,9 @@ class TestUtil(unittest.TestCase):
             "1":{"src":"skipped", "type": "application/vnd.apple.mpegURL"}
         }''')
 
+        inp = '''{"foo":101}'''
+        self.assertEqual(js_to_json(inp), '''{"foo":101}''')
+
     def test_js_to_json_edgecases(self):
         on = js_to_json("{abc_def:'1\\'\\\\2\\\\\\'3\"4'}")
         self.assertEqual(json.loads(on), {"abc_def": "1'\\2\\'3\"4"})
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index c8308ba3a..82f67f6cd 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1970,7 +1970,7 @@ def js_to_json(code):
         '(?:[^'\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^'\\]*'|
         /\*.*?\*/|,(?=\s*[\]}])|
         [a-zA-Z_][.a-zA-Z_0-9]*|
-        (?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:\s*:)?|
+        \b(?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:\s*:)?|
         [0-9]+(?=\s*:)
         ''', fix_kv, code)